SM712.TCT Semtech, SM712.TCT Datasheet

IC TVS ASYMM RS-485V 7/12V SOT23

SM712.TCT

Manufacturer Part Number
SM712.TCT
Description
IC TVS ASYMM RS-485V 7/12V SOT23
Manufacturer
Semtech
Datasheet

Specifications of SM712.TCT

Voltage - Reverse Standoff (typ)
12V
Voltage - Breakdown
13.3V
Power (watts)
400W
Polarization
2 Channel Array - Bidirectional
Mounting Type
Surface Mount
Package / Case
SOT-23-3
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
SM712TR

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The SM712 transient voltage suppressor (TVS) diode is
designed for asymmetrical (12V to -7V ) protection in
multi-point data transmission standard RS-485 applica-
tions. The SM712 may be used to protect devices
from transient voltages resulting from electrostatic
discharge (ESD), electrical fast transients (EFT), and
lightning.
The SM712 features 400 Watts (tp = 8/20µs) of
power handling capability to accommodate the higher
transient voltage levels which may be expected in
extended common mode applications. This provides
higher equipment reliability and eliminates the “guess
work” required when using zener diodes that are not
rated to handle such transient conditions.
The SM712 replaces four discrete components by
integrating two 12V and two 7V TVS diodes in a single
package. The integrated design aids in reducing
voltage over-shoot associated with trace inductance.
The low clamping voltage of the SM712 minimizes the
stress on the protected transceiver. The SOT23
package allows flexibility in the design of “crowded”
circuit boards.
Revision 11/17/04
PROTECTION PRODUCTS
PROTECTION PRODUCTS
Description
Circuit Diagram
1
Features
Mechanical Characteristics
Applications
Schematic & PIN Configuration
Extended Common-Mode RS-485
400 watts peak pulse power (t
Transient protection for asymmetrical data lines to
IEC 61000-4-2 (ESD) ±15kV (air), ±8kV (contact)
IEC 61000-4-4 (EFT) 40A (5/50ns)
IEC 61000-4-5 (Lightning) 12A (8/20µs)
Protects two +12V to -7V lines
Low capacitance
Low clamping voltage
Solid-state silicon avalanche technology
JEDEC SOT23 package
Molding compound flammability rating: UL 94V-0
Marking : 712
Packaging : Tape and Reel per EIA 481
Protection of RS-485 transceivers with extended
common-mode range
Security systems
Automatic Teller Machines
HFC systems
Networks
Asymmetrical TVS Diode for
SOT23 (Top View)
p
= 8/20µs)
www.semtech.com
SM712

Related parts for SM712.TCT

SM712.TCT Summary of contents

Page 1

... Molding compound flammability rating: UL 94V-0 Marking : 712 Packaging : Tape and Reel per EIA 481 Applications Protection of RS-485 transceivers with extended common-mode range Security systems Automatic Teller Machines HFC systems Networks Schematic & PIN Configuration SOT23 (Top View) 1 SM712 = 8/20µs) p www.semtech.com ...

Page 2

... PROTECTION PRODUCTS PROTECTION PRODUCTS Absolute Maximum Rating µ µ Electrical Characteristics 2004 Semtech Corp µ µ SM712 www.semtech.com ° C ° C ° ...

Page 3

... Non-Repetitive Peak Pulse Power vs. Pulse Time 10 1 0.1 0.01 0 Pulse Duration - t Pulse Waveform 110 100 (µs) Capacitance vs. Reverse Voltage Reverse Voltage - V 2004 Semtech Corp. 110 100 100 1000 (µs) p Clamping Voltage vs. Peak Pulse Current 24 W aveform 22 Parameters 8µ 20µ 1MHz ( SM712 ...

Page 4

... The ground pin (Pin 3) should be con- nected directly to a ground plane on the circuit board for best results. Minimize all conductive loops including power and ground loops. Never run critical signals near board edges. 2004 Semtech Corp. RS-485 Common Mode Voltages RS-485 Protection Circuit 4 SM712 www.semtech.com ...

Page 5

... DIMENSIONS "E1" AND "D" DO NOT INCLUDE MOLD FLASH, PROTRUSIONS 3. OR GATE BURRS. Land Pattern - SOT23 NOTES: 1. THIS LAND PATTERN IS FOR REFERENCE PURPOSES ONLY CONSULT YOUR MANUFACTURING GROUP TO ENSURE YOUR COMPANY'S MANUFACTURING GUIDELINES ARE MET. REFERENCE IPC-SM-782A. 2. 2004 Semtech Corp. H GAUGE PLANE SEATING E PLANE 0.25 C DETAIL aaa C 3X ...

Page 6

... PROTECTION PRODUCTS PROTECTION PRODUCTS Ordering Information Contact Information Phone: (805)498-2111 FAX (805)498-3804 2004 Semtech Corp Semtech Corporation Protection Products Division 200 Flynn Road, Camarillo, CA 93012 6 SM712 www.semtech.com ...

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